JSON to CSV Converter: How to Turn API Data into Spreadsheets You Can Actually Use

JSON is how most APIs and modern databases hand you data — but it is a terrible format for sorting, filtering, or sharing with non-technical teammates. Converting it to CSV unlocks the data in Excel, Google Sheets, and every reporting tool. The JSON to CSV Converter at Today Calculator does the conversion in your browser — nothing is uploaded to a server.

When You Need JSON to CSV

• API exports: Pull user or order data from an API and analyze it in a spreadsheet.
• Database dumps: Import JSON exports into SQL databases or BI tools that prefer tabular data.
• Team handoffs: Send a clean CSV to a colleague who doesn’t work with JSON.
• Reporting: Feed tabular data into dashboards and visualization tools.

Simple Array Example

A flat array of objects converts one-to-one into a table — each object becomes a row, each key becomes a column:

JSON	CSV Output
[{“name”: “John”, “age”: 30}, {“name”: “Jane”, “age”: 25}]	name,age John,30 Jane,25

Handling Nested Objects and Arrays

Real-world JSON is rarely flat — users have address objects, orders have item arrays. The converter gives you three strategies for nested objects:

• Flatten with dot notation: Turns address.street and address.city into their own columns. Best for keeping detail.
• Convert to JSON strings: Keeps the nested structure intact in a single cell. Good when you don’t need to filter on it.
• Ignore: Drops nested data entirely. Useful for quick, clean exports.

Arrays of values get similar options: stringify them, join with commas, take the first element, or drop them. You can also pick the delimiter (comma, semicolon, tab, or pipe) to match your locale’s spreadsheet conventions.

How to Convert in Three Steps

1. Upload or paste your JSON file or text (up to 10 MB per file).
2. Choose your settings — delimiter, nested handling, array handling, headers.
3. Preview and download — check the first five rows, then download the CSV.

Because all processing happens client-side, sensitive API responses and customer data never leave your machine. Try the JSON to CSV Converter on your next API export.